IANA time zone database: Difference between revisions

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{{IANA time zone database}}
== Abbreviations ==
== Abbreviations ==
* proposal to change to [[Internationalized time point unique time zone abbreviations]] at http://mm.icann.org/pipermail/tz/2012-October/018362.html
[[IANA time zone database - time zone acronyms]]


== Bugs ==
[[IANA time zone database - bugs]]


=== Special abbreviations ===
==Zone terminology==
* LMT - local mean time
----
Guy Harris 2013-09-18 23:37:48 http://mm.icann.org/pipermail/tz/2013-September/020284.html


=== Composing parts ===
So I prefer terms such as "tzdb zone" to refer to those things that have tzids. I'm not wedded to *that* term, but there should be *some* term other than "time zone" for that.
{| class="wikitable"
! position from right
! Letter
! Meaning
! Occurrence
|-
| 1
| T
| Time
| always
|-
| 2
| D
| Daylight (Saving) (DST 1:00)
| several
|-
| 2
| S
| Standard
| several
|-
| 2
| S
| Summer (DST 1:00)
| europe file: e.g. BST British Summer Time, CEST Central European Summer Time
|-
| 2
| W
| War
| northamerica file: US and Mexico
|-
| 2
| P
| Peace
| northamerica file: US
|-
| 2
| M
| Mean
|
* africa file: LMT # Lisbon Mean Time, FMT # Freetown Mean Time, PMT # Paris Mean Time
* europe file: MMT # Moscow Mean Time
* southamerica file: CMT # Cordoba Mean Time, CMT # Calamarca MT(!), QMT # Quito Mean Time, BMT # Bogota Mean Time, SMT # Stanley Mean Time, SMT # Santiago Mean Time, MMT # Montevideo MT(!), PMT # Paramaribo Mean Time, CMT # Caracas Mean Time
|-
| 2
| M
| Midsummer (DST 2:00)
| europe file: Moscow - M # Midsummer, also for Spain, France, Germany/SovietZone
|-
| 32
| LM
| Local Mean
| several
|-
| 32
| DS
| Double Summer (DST 2:00)
| europe file: MDST # Moscow Double Summer Time, BDST - British Double Summer Time
|-
| 32
| DD
| Double Daylight (Saving) (DST 2:00)
| northamerica file: StJohns 1988)
|-
| 32
| HS
| half summer time? (DST 0:30)
|
* australasia file: Pacific/Rarotonga CK%sT and "HS"
* southamerica file: Uruguay
|-
| 32
| HS
| ? (DST 0:20)
|
* africa file: Rule Ghana 1936-1942
|-
| 32
| HD
| half daylight saving time? (DST 0:30)
|
* northamerica file: Rule Belize 1918-1942
* northamerica file: Rule DR 1969-1973
|}


Other:
The tzdb currently does not have a concept of "time zone" in the sense of a region with a specified base time offset; are you suggesting that it add one?
Kampala:
----
3:00 - EAT 1930
2:30 - BEAT 1948
2:45 - BEAUT 1957
Aruba (in ISO 3166-1 AW)
-4:00 - AST
GBGT 1966 May 26 # Br Guiana Time
NEGT 1975 Nov 20 # Dutch Guiana Time
* Two letters for locality - xxT
** Brazil - Fernando Noronha: FNT
* Two letter for locality - xxST
** Lord Howe : LHST
* Two letters for locality - xx%sT
** Several zone in Brazil that use Brasilia BRT (BR is also the country code)
 
== Bugs ==
Some fixes can be found at [[ANNA time zone database]].
{| class="wikitable sortable"
! Country
! Description
! width=64 | Open since at least
! Why not fixed?
|-
| [[Australia]]
| EST and CST are used as acronyms for AEST/AEDT and CEST/CEDT, i.e. during DST one cannot tell from the acronym what zone is meant.
| 2006-06-02 04:08:36 [http://article.gmane.org/gmane.comp.time.tz/1042/match=est]
| TZ coordinator (Paul Eggert) does not want to fix
|-
| [[Indonesia]]
| WIT means Western Indonesian Time, but in local Indonesian language, WIT stands for Waktu Indonesia Timur (Eastern Indonesian Time), change requests - without mentioning the ambiguity - go back to 2003 [http://article.gmane.org/gmane.linux.debian.devel.glibc/12741/match=wita+wib+wit]
| 2013-02-13 14:17:58 [http://article.gmane.org/gmane.comp.time.tz/5839]
| TZ coordinator (Paul Eggert) does not fix
|-
| [[Norway]]
| No IANA zone defined for Bouvet Island while Norwegian law sets a standard time http://article.gmane.org/gmane.comp.time.tz/5218/
| 2012-05-29 18:32:23 [http://article.gmane.org/gmane.comp.time.tz/5218/]
| TZ coordinator (Paul Eggert) does not want to fix
|-
| [[Russia]]
|
*Zones in Siberia are wrong
* patch provided 2012-05-02 22:18:43 by Arthur David Olson [http://article.gmane.org/gmane.comp.time.tz/4905/match=barnaul+tomsk]
| 2011-09-17 16:12:16 [http://article.gmane.org/gmane.comp.time.tz/4872/match=siberia]
| TZ coordinator (Paul Eggert) does not fix - reason unknown
|-
| Australia/Antarctica
| Antarctica/Macquarie given as AQ territory, not AU territory.
| 2013-04-12
|
|}


==Localization==
==Localization==
Line 149: Line 20:


* territory 001 - might refer to the UN M.49 code for "World".
* territory 001 - might refer to the UN M.49 code for "World".
==Zone changes==
2013-08-11
-AQ    -7750+16636    Antarctica/McMurdo      McMurdo Station, Ross Island
-AQ    -9000+00000    Antarctica/South_Pole  Amundsen-Scott Station, South Pole
+AQ    -7750+16636    Pacific/Auckland        McMurdo, South Pole, Scott (New Zealand time)
So Pacific/Auckland now has two pairs of coordinates, the new AQ-one and the old NZ-one.
NZ -3652+17446 Pacific/Auckland most locations
*Connecting Vaduz to Bern Mean Time
**http://mm.icann.org/pipermail/tz/2013-September/020085.html

Latest revision as of 2014-07-20T03:04:38

Abbreviations

IANA time zone database - time zone acronyms

Bugs

IANA time zone database - bugs

Zone terminology

Guy Harris 2013-09-18 23:37:48 http://mm.icann.org/pipermail/tz/2013-September/020284.html

So I prefer terms such as "tzdb zone" to refer to those things that have tzids. I'm not wedded to *that* term, but there should be *some* term other than "time zone" for that.

The tzdb currently does not have a concept of "time zone" in the sense of a region with a specified base time offset; are you suggesting that it add one?

Localization

CLDR

http://unicode.org/repos/cldr/trunk/common/supplemental/metaZones.xml

  • territory 001 - might refer to the UN M.49 code for "World".

Zone changes

2013-08-11 

-AQ     -7750+16636     Antarctica/McMurdo      McMurdo Station, Ross Island
-AQ     -9000+00000     Antarctica/South_Pole   Amundsen-Scott Station, South Pole
+AQ     -7750+16636     Pacific/Auckland        McMurdo, South Pole, Scott (New Zealand time)

So Pacific/Auckland now has two pairs of coordinates, the new AQ-one and the old NZ-one. 

NZ	-3652+17446	Pacific/Auckland	most locations
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